FPGA-based cement thickness tester

Abstract

The invention discloses an FPGA-based cement thickness tester which comprises a manual operation vicat apparatus (1), wherein a needle penetration measuring device (2) is arranged at one side of the manual operation vicat apparatus (1) and comprises a grid capacitance ruler (3) and a digital displaying instrument (4) comprising an FPGA detection system, the digital displaying instrument (4) can be vertically and movably arranged on the grid capacitance ruler (3), the grid capacitance ruler (3) is connected with a value indicating plate (1.1) of the manual operation vicat apparatus (1), and an indicator (1.3) of the value indicating value (1.1) is connected with the digital displaying instrument (4) by virtue of a linkage rod (5). The FPGA-based cement thickness tester can be technically reconstructed on the basis of an original structure of the manual operation vicat apparatus, can be zeroed at any position, and can be used for directly and digitally displaying the needle penetration to obtain an experiment value with the relatively high precision, so that operation steps of experimenters are simplified, the operation time is saved, and the precision of an experiment result is improved.

Description

technical field [0001] The invention belongs to the field of cement consistency measuring devices, in particular to an FPGA-based cement consistency measuring instrument. Background technique [0002] Cement setting time is one of the important parameters of cement physical properties. Cement coagulation refers to the process in which the cement is mixed with water to form a standard cement slurry, from a plastic state to a solid state with a certain strength. The time when cement loses plasticity is called initial setting time; the time when cement begins to produce a certain strength is called final setting time. At present, the standard adopted in our country is GB / T 1346-2001 "Cement Standard Consistency Water Consumption, Setting Time, Stability Test Method". Among them, the determination of the water consumption of the standard consistency has the following regulations: use a test rod with a diameter of 10mm to insert the cement slurry with a thickness of 40mm in a f...

AI Technical Summary

Problems solved by technology

This technology has three disadvantages: 1. Due to the large number of operations required, the zero point needs to be adjusted each time, which increases the repeated workload of the experimenters; 2. The recording and calculation of the difference between the starting point scale and the end point scale prolongs the operation of the experimenter 3. The accuracy can only reach 1mm

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